References
N. P. Bhatia andO. Hájek, Theory of Dynamical Systems I, Technical Note BN-599, University of Maryland, 1969.
W. J. Thron,Topological Structures, Holt, Rinehart and Winston, New York, 1966.
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The first author was supported, in part, by the National Science Foundation under grant no. NSF-GP-12261; the second was supported, in part, by a NASA fellowship.
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Hájek, O., Simanaitis, D.J. Limit points which are not sequentially attainable. Math. Systems Theory 5, 289–291 (1971). https://doi.org/10.1007/BF01694071
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DOI: https://doi.org/10.1007/BF01694071